<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>

<frameset bordercolor="green" border="100" rows="25%,50%,*">
	<frame src="./subframe/top.html" name="top" />
	<frame src="subframe/middle.html" name="middle" />
	<frame src="subframe/bottom.html" name="bottom" />
</frameset>
<noframes>
	<body>如浏览器不支持框架，才显示body内的内容
	</body>
</noframes>
</html>